Mood disorders are a group of mental health conditions that primarily affect a person's emotional state. They can cause significant changes in mood, leading to feelings of sadness, irritability, or extreme highs and lows. Common types include Major Depressive Disorder and Bipolar Disorder, which can disrupt daily life and relationships. These disorders can be triggered by various factors, including genetics, brain chemistry, and life events. Treatment options often include therapy, medication, and lifestyle changes, which can help individuals manage their symptoms and improve their quality of life.